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Cadence Skill - Totally Buggy?

cado

skill evaluates 0.142-0.142 as follows 

||(0.142 - 0.142)
||difference --> -5.273559e-16 
and 

if(0.142==0.142) as 

||(0.142 == 0.142)
||equal --> nil 

Is SKILL mad? 
 
min(1,2,3) gives you 1 

but make a list list1='(1,2,3) 

then min(list1) gives you => 

(1,2,3)! 

in SKILL -5.273559e-16 & 0 are the SAME!!! 

and 0.142 is not equal to 0.142!!! 
 
Could anyone try the following script and tell me about the problem?
 
cv=geGetEditCellView()
cell=cv~>cellName
wlist=list()
foreach(x cv~>shapes if(x~>lpp==list("M4" "drawing") then if(x~>width!=nil then wlist=cons(x~>width wlist) nwidth=mapw(x~>width)  
        printf("%s %f\n" "path width= " nwidth)          
        else
 bbx=x~>bBox
 ll=lowerLeft(bbx)
 ur=upperRight(bbx)
 lly=yCoord(ll)
 ury=yCoord(ur)
 llx=xCoord(ll)
 urx=xCoord(ur)
 lx=urx-llx
 ly=ury-lly
 width=min(lx,ly)
 wlist=cons(width wlist)
 nwidth=mapw(width)
 printf("%s %f\n" "Rectangle width= " nwidth)
) ;if x~>width!=nil
) ;if M4
) ; foreach shape
printf( "%s %s\n" "cell: " cell)

procedure(mapw(w)
mapwlist='(0.052,0.066,0.072,0.09,0.1,0.142,0.23)
prog(()
if(w>=0.7 then
 return(w)
 else
 match=0
 foreach(mpl mapwlist
  if(w==mpl then match++)
  )
  if(match>0 then return(w)
     else
     dlist=list()
     foreach(mpl mapwlist
      diff=abs(w-mpl)
      dlist=cons(diff dlist)
      )
       mindiff=()
       dls=0.0
       for(i 0 length(dlist)-1  dls=nth(i dlist)
      if(i!=0 then dlspre=nth(i-1 dlist)
         if(dls>dlspre then  mindiff=dlspre else mindiff=dls) else mindiff=dls)
         )    
     
      foreach(mpl mapwlist
       if(abs(w-mpl)==mindiff then
           return(mpl)
          )
            
      ) ;foreach mpl
      ) ;if match>0
      ) ;if w>0.7
      ) ;prog

)
Parents

  • Thanks Berk....

    apply('min Lst)  works....

    but still there are issues....

    Actually I wanted to search for all"metal-4 drawing" layers, find their width, map it to the closest value in a specific list ("mapwlist") and print the newly mapped width. I made mapw function for mapping.It should have mapped a rectangle of 0.142 micron width to 0.142, instead it maps it to 0.066! I did a tracef() and found all these anomalies. I am sure it's not the issue with floating point round off.

    when I type mapw(0.142), it returns 0.142, but if I run the whole script, it maps 0.142 to 0.066.

     Please Help me if you know about this.

    Thanks in Advance! :-) 

Reply

  • Thanks Berk....

    apply('min Lst)  works....

    but still there are issues....

    Actually I wanted to search for all"metal-4 drawing" layers, find their width, map it to the closest value in a specific list ("mapwlist") and print the newly mapped width. I made mapw function for mapping.It should have mapped a rectangle of 0.142 micron width to 0.142, instead it maps it to 0.066! I did a tracef() and found all these anomalies. I am sure it's not the issue with floating point round off.

    when I type mapw(0.142), it returns 0.142, but if I run the whole script, it maps 0.142 to 0.066.

     Please Help me if you know about this.

    Thanks in Advance! :-) 

Children
No Data

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